New to Java

I'm still quite new to Java, but a lot of the time I experience this error. For example, the compiler throws an error in the main() method in this program. Usually I get around it by changing all methods and variables to static but there must be another way?

package convertor;
import java.io.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;

public class Main {
    private JFrame mainwindow;
    private JButton gobutton;
    private JTextField input;

    public Main() {
    }
    
    public void drawgui() {
        
    }
    
    public static void main(String[] args) {
        drawgui();
    }
    
}